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{{Short description|Upper stage for NASA's Saturn I rocket}}
{{Infobox rocket stage
{{Infobox rocket stage
|name = S-IV
|name = S-IV
Line 6: Line 7:
|country = United States
|country = United States
|rockets = [[Saturn I]] (stage 2)
|rockets = [[Saturn I]] (stage 2)
|height = 12.19 m
|height = {{convert|12.19|m|ft|abbr=on}}
⚫
|diameter = {{convert|5.49|m|ft|abbr=on}}
|alt-height = 40 ft
|mass = {{convert|50,576|kg|lb|abbr=on}}
⚫
|diameter = 5.49 m
|propmass = {{Convert|45,359|kg|lb|sigfig=3|abbr=on}}
|alt-diameter = 18 ft
| empty = {{Convert|5,217|kg|lb|sigfig=3|abbr=on}}
|mass =
| status = Retired
|alt-mass =
| launches = 6
| success = 6
| fail = 0
| first = January 29, 1964
| last = July 30, 1965

{{Infobox rocket/stage
| name = S-IV 100 series
|engines = 6 [[RL-10 (rocket engine)|RL-10]] engines
|engines = 6 [[RL-10 (rocket engine)|RL-10]] engines
|thrust = 400 kN
|thrust = {{convert|400|kN|lbf|abbr=on}}
| SI = {{Convert|410|isp|abbr=on}}
|alt-thrust = 90,000 lbf
| burntime = 482 s
|time = ~410 seconds
|fuel = [[LOX]]/[[LH2]]
| fuel = [[LH2|LH<sub>2</sub>]] / [[Liquid oxygen|LOX]]
}}
}}
}}
The '''S-IV''' was the [[Multistage rocket|second stage]] of the [[Saturn I]], a [[Rocket| rocket-powered]] [[launch vehicle]] used by [[NASA]] for early flights in the [[Project Apollo|Apollo]] program.
The '''S-IV''' was the [[Multistage rocket|second stage]] of the [[Saturn I]] [[rocket]] used by [[NASA]] for early flights in the [[Apollo program]].


The S-IV was manufactured by the [[Douglas Aircraft Company]] and later modified by them to the [[S-IVB]], a similar but distinct stage used on the [[Saturn IB]] and [[Saturn V]] rockets.<ref name="stages1">{{Harvnb|Bilstein|1999|loc=p. 157}}</ref>
The S-IV was manufactured by the [[Douglas Aircraft Company]] and later modified by them to the [[S-IVB]], a similar but distinct stage used on the [[Saturn IB]] and [[Saturn V]] rockets.<ref name="stages1">{{Harvnb|Bilstein|1999|loc=p. 157}}</ref>


The S-IV stage was a large LOX/LH<sub>2</sub>-fueled rocket stage used for the early test flights of the Saturn I rocket. It formed the second stage of the Saturn I and was powered by a cluster of six [[RL-10|RL-10A-3]] engines. Each one of the engines supplied {{convert|66.7|kN}} of thrust for a total of about {{convert|400|kN}}. The cryogenic LH<sub>2</sub> ([[liquid hydrogen]]) and LOX ([[liquid oxygen]]) tanks were separated by a common bulkhead. The forward bulkhead of the LOX tank formed the aft bulkhead of the LH<sub>2</sub> tank. This saved about ten tons of structural weight.<ref name="stages2">{{Harvnb|Bilstein|1999|loc=pp. 166-168}}</ref><ref>{{Harvnb|Apollo Summary Report|1975|loc=p. 187}}</ref>
The S-IV stage was a large LOX/LH<sub>2</sub>-fueled rocket stage used for the early test flights of the Saturn I rocket. It formed the second stage of the Saturn I and was powered by a cluster of six [[RL10|RL-10A-3]] engines. Each one of the engines supplied {{convert|66.7|kN}} of thrust for a total of about {{convert|400|kN}}. The cryogenic LH<sub>2</sub> ([[liquid hydrogen]]) and LOX ([[liquid oxygen]]) tanks were separated by a common bulkhead. The forward bulkhead of the LOX tank formed the aft bulkhead of the LH<sub>2</sub> tank. This saved up to 20% of structural weight.<ref name="stages2">{{Harvnb|Bilstein|1999|loc=pp. 166-168}}</ref><ref>{{Harvnb|Apollo Summary Report|1975|loc=p. 187}}</ref>

==See also==
*[[Saturn I#S-IV stage|S-IV stage of the Saturn I]]


==References==
==References==
{{reflist}}
{{reflist}}
{{refbegin}}
{{refbegin}}
*{{cite book|title=Stages to Saturn: A Technological History of the Apollo/Saturn Launch |url=http://books.google.com/books?id=JnoZTbVLx0MC|author=Bilstein, Roger E.|publisher=DIANE Publishing |year=1999|accessdate=2010-05-04|chapter=6|ref=CITEREFBilstein1999}}
*{{cite book|title=Stages to Saturn: A Technological History of the Apollo/Saturn Launch |url=https://books.google.com/books?id=JnoZTbVLx0MC|author=Bilstein, Roger E.|publisher=DIANE Publishing |year=1999|accessdate=2010-05-04|chapter=6| isbn=9780788181863 |ref=CITEREFBilstein1999}}
*{{cite web | url = http://history.nasa.gov/alsj/APSR-JSC-09423.pdf |format=PDF| title = Apollo Program Summary Report (Large file) | author = NASA |date=April 1975 |ref=CITEREFApollo_Summary_Report1975}}
*{{cite web | url = https://history.nasa.gov/alsj/APSR-JSC-09423.pdf | title = Apollo Program Summary Report (Large file) | author = NASA |date=April 1975 |ref=CITEREFApollo_Summary_Report1975}}
{{refend}}
{{refend}}

{{Upper stages}}


[[Category:Apollo program]]
[[Category:Apollo program]]
[[Category:Rocket stages]]
[[Category:Rocket stages]]
[[Category:Saturn I]]

Latest revision as of 00:19, 27 December 2023

S-IV
Schematics of the S-IV
ManufacturerDouglas Aircraft Company
Country of originUnited States
Used onSaturn I (stage 2)
General characteristics
Height12.19 m (40.0 ft)
Diameter5.49 m (18.0 ft)
Gross mass50,576 kg (111,501 lb)
Propellant mass45,359 kg (100,000 lb)
Empty mass5,217 kg (11,500 lb)
Launch history
StatusRetired
Total launches6
Successes
(stage only)		6
Failed0
First flightJanuary 29, 1964
Last flightJuly 30, 1965
S-IV 100 series
Powered by6 RL-10 engines
Maximum thrust400 kN (90,000 lbf)
Specific impulse410 s (4.0 km/s)
Burn time482 s
PropellantLH2 / LOX

The S-IV was the second stage of the Saturn I rocket used by NASA for early flights in the Apollo program.

The S-IV was manufactured by the Douglas Aircraft Company and later modified by them to the S-IVB, a similar but distinct stage used on the Saturn IB and Saturn V rockets.[1]

The S-IV stage was a large LOX/LH2-fueled rocket stage used for the early test flights of the Saturn I rocket. It formed the second stage of the Saturn I and was powered by a cluster of six RL-10A-3 engines. Each one of the engines supplied 66.7 kilonewtons (15,000 lbf) of thrust for a total of about 400 kilonewtons (90,000 lbf). The cryogenic LH2 (liquid hydrogen) and LOX (liquid oxygen) tanks were separated by a common bulkhead. The forward bulkhead of the LOX tank formed the aft bulkhead of the LH2 tank. This saved up to 20% of structural weight.[2][3]

References

[edit]
  1. ^ Bilstein 1999, p. 157
  2. ^ Bilstein 1999, pp. 166-168
  3. ^ Apollo Summary Report 1975, p. 187
  • Bilstein, Roger E. (1999). "6". Stages to Saturn: A Technological History of the Apollo/Saturn Launch. DIANE Publishing. ISBN 9780788181863. Retrieved 2010-05-04.
  • NASA (April 1975). "Apollo Program Summary Report (Large file)" (PDF).
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